EP 0230896 B1 19920826 - MICROPROCESSOR CONTROL UNIT FOR SERIAL DOT MATRIX PRINTER
Title (en)
MICROPROCESSOR CONTROL UNIT FOR SERIAL DOT MATRIX PRINTER
Publication
Application
Priority
IT 1915786 A 19860122
Abstract (en)
[origin: EP0230896A2] Microprocessor control unit for a serial dot matrix printer where a plurality of codes representative of printing commands are each read out from a data memory (2) by the control unit, through the execution of a memory read instruction by the microprocessor (1) and loaded into a one of a plurality of command registers (4,5) for printing elements, in the course of execution of the same memory read instruction, owing to the preset at preestablished logic level of a microprocessor output terminal (addressing terminal or auxiliary output port terminal) before the execution of the memory read instructions during which the simultaneous loading of the command register is required, owing to the maintaining at such prestablished level of said output terminal during the execution of the memory read instructions and owing to logical ciruits (3,6,8,9,10,11) which in response to such preestablished level of said terminal, to a timing signal for the memory read operations and to an address signal or address code, generate a selection and load signal for one of said plurality of command register for the printing elements.
IPC 1-7
IPC 8 full level
G06K 15/10 (2006.01)
CPC (source: EP)
G06K 15/10 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0230896 A2 19870805; EP 0230896 A3 19890322; EP 0230896 B1 19920826; DE 3781286 D1 19921001; DE 3781286 T2 19930218; IT 1188302 B 19880107; IT 8619157 A0 19860122
DOCDB simple family (application)
EP 87100307 A 19870113; DE 3781286 T 19870113; IT 1915786 A 19860122